高桩码头桩群对水动力参数影响的数值模拟  

Numerical simulation of the impact of pile groups of high-pile wharves on hydrodynamic parameters

作　　者：薛玉娆 张金凤[1,2] 张庆河[1] 尤再进 季则舟[4] XUE Yurao;ZHANG Jinfeng;ZHANG Qinghe;YOU Zaijin;JI Zezhou(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300350,China;Key Laboratory of Earthquake Engineering Simulation and Seismic Resilience of China Earthquake Administration,Tianjin University,Tianjin 300350,China;College of Transportation Engineering,Dalian Maritime University,Dalian 116026,China;CCCC First Harbor Consultants Co.,Ltd.,Tianjin 300222,China)

机构地区：[1]天津大学水利工程智能建设与运维全国重点实验室,天津300350 [2]天津大学地震工程模拟与抗震恢复中国地震局重点实验室,天津300350 [3]大连海事大学交通运输工程学院,辽宁大连116026 [4]中交第一航务工程勘察设计院有限公司,天津300222

出　　处：《水利水运工程学报》2024年第5期95-102,共8页Hydro-Science and Engineering

基　　金：国家重点研发计划项目(2021YFB2601100)。

摘　　要：桩基码头是常用的码头结构形式,应用广泛。高桩码头桩群基础改变了周围水动力场,引起泥沙冲淤规律的变化,从而对码头结构稳定性产生影响,研究圆柱桩群阻力特性,对水流和底床冲淤变化研究具有重要意义。基于FVCOM的三维水动力模型,将桩柱绕流阻力等效为水流阻力,提出一种桩群阻水效果的概化方法,通过增加桩群阻力项来研究桩群对水动力环境参数的影响,构建了群桩下方和后方水动力规律的三维水动力改进模型。该模型应用于舟山某高桩码头附近流场的模拟计算,结果与实测值吻合良好,证明了模型的有效性;计算结果表明,桩群影响使得码头后方的流速减小,比码头前方减小约67%。所构建的模型可进一步研究高桩码头下方和后方冲淤演变规律,为码头建设和运维提供技术支撑。Pile foundation wharves are commonly used dock structures with widespread applications.The foundations of high-pile wharves,consisting of groups of piles,alter the surrounding hydrodynamic field,causing changes in the sedimentation and erosion patterns,thereby affecting the stability of the dock structures.The study of cylindrical pile group resistance characteristics is of significant importance for the research on water flow and bed-load sediment transport changes.Based on the three-dimensional hydrodynamic model of FVCOM,this study equates pile flow resistance to water flow resistance and proposes a generalized method for the water-blocking effect of pile groups.By adding a pile group resistance term,the study investigates the impact of pile groups on hydrodynamic environmental parameters and constructs a three-dimensional hydrodynamic improvement model for water dynamics below and behind the pile groups.This model was applied to simulate the flow field near a high-pile wharf in Zhoushan,and the results closely matched measured values,proving the model's effectiveness.The findings indicate that the pile group effect results in a decrease in the flow velocity behind the wharf by approximately 67%compared to the front.The constructed model can further investigate the evolution of sediment transportation patterns below and behind the highpile wharf,providing technical support for wharf construction and operation.

关 键 词：水流阻力 桩群概化 FVCOM三维模型 水动力 高桩码头 

分 类 号：U651[交通运输工程—港口、海岸及近海工程]